Research On Auxiliary Simulation And Emulation System Of Tram Signal

With the rapid growth of urban population,road traffic congestion and pollution problems are becoming increasingly serious.The construction of a green and intelligent urban rail transit system has become the preferred solution to alleviate traffic problems in more and more large cities.With the advantages of high capacity,low construction cost and energy saving,modern trams have been developing rapidly in China in recent years.How to give full play to the reliability,comfort and transit priority of the tram has become an important issue worth exploring and studying.The trams in our country are mainly in semi-independent right-of-way form.The signal control at intersections is a key technology in the operation of trams.When the tram has unplanned delay,it may encounter red light at the intersection,if no signal adjustment is implemented,the subsequent delay may be aggravated,while simply giving it priority signal may have a large impact on the occupied phase of social vehicles.There are few industry standards and technical specifications related to trams in our country,and the research on tram operation control is still in the development stage.This paper establishes a relevant model based on summarizing the results of existing public transportation priority and train operation control to realize the optimization of tram operation and at the same time guarantee the overall service level of the line.The implementation of the tram signal simulation assistance system is important for the verification of train operation optimization scheme and the training needs of signal professionals.The main research contents of this thesis include the following parts:(1)To alleviate the right-of-way conflicts between tram and social vehicles at single-signal intersections in a network-connected environment,a guided optimization model combining urban rail and road traffic is constructed.An online collaborative optimization algorithm is proposed to realize the integrated adjustment of operation trajectories and signal timing with the energy consumption,passenger passage time and comfort of both tram and connected vehicles as the optimization objectives,and the problem is solved by an improved elite genetic algorithm.The right-of-way allocation conflicts at the intersection are alleviated,and it has excellent applicability under different ridership ratios.(2)For tram with unplanned delays in mainline operation,a route model is constructed and a combined approach of tram speed adjustment and priority signaling implementation is proposed.The per capita delay of tram and social vehicles passengers,energy consumption of tram and comfort of passengers are the optimization objectives,so that tram can return to the planned moment as soon as possible and reduce the negative impact on social vehicles.Comparing two non-cooperative optimization methods,the optimization in this paper can maximize the benefits of different users of the line,and the model is verified to have excellent applicability in different traffic scenarios.(3)Using WPF technology to complete the tram signal simulation assistance simulation system,the MVVM development model is used to decouple the interface display and logic processing.Detailed design and implementation of the interface display,train tracking,system operation and communication and other core functions,through the test shows that the system can achieve the expected results,has a high value of use.